<li id='29'>
    <span type='0'>洗涤产品</span>
    <ul>
        <li id='30'>
            <span type='0'>洗衣粉</span>
        </li>
        <li id='31'>
            <span type='0'>香皂</span>
        </li>
    </ul>
</li>

<li id='29'>
    <span type='0'>电器产品</span>
    <ul>
        <li id='30'>
            <span type='0'>洗衣机</span>
        </li>
        <li id='31'>
            <span type='0'>冰箱</span>
        </li>
    </ul>
</li>
